WordNet (r) 3.0 (2006):

stateless person
    n 1: a person forced to flee from home or country [syn:
         displaced person, DP, stateless person]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "stateless person":
   DP, absconder, bolter, deported population, deportee, deracine,
   displaced person, eloper, emigrant, emigre, escapee, evacue,
   evacuee, exile, expatriate, fleer, fugitive, immigrant, in-migrant,
   migrant, migrator, migratory worker, out-migrant, refugee,
   runagate, runaway, skedaddler, trekker, wetback